#include<LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);//ឈ, ដេក
void setup(){
  Serial.begin(9600);
  lcd.init(); //initialize
  lcd.backlight(); //turn on backlight
  lcd.setCursor(0, 0); //ឈ, ដេក
  lcd.print("Hello ESP32");
  delay(5000);
  lcd.clear();
}

void loop(){
  if(Serial.available()>0){
    String cmd = Serial.readString();
    Serial.println(cmd);
    lcd.clear();
    lcd.setCursor(1, 0);
    lcd.print(cmd);
  }
}